docs: Documentation update, initial preparation for version 2.1 release

Change-Id: I3694a8791b9540fc1b926a83ff55421b47e0f1e2
diff --git a/README.md b/README.md
index a185ecd..b815951 100644
--- a/README.md
+++ b/README.md
@@ -1,19 +1,24 @@
-ndnSIM 2.0
-==========
+ndnSIM
+======
 
-ndnSIM 2.0 is a new release of [NS-3 based Named Data Networking (NDN)
-simulator](http://ndnsim.net/1.0/) that went through extensive refactoring and rewriting.
-The key new features of the new version:
+[![Build Status](https://travis-ci.org/named-data-ndnSIM/ndnSIM.svg)](https://travis-ci.org/named-data-ndnSIM/ndnSIM)
 
-- ndnSIM no longer re-implements basic NDN primitives and directly uses implementation from
+A new release of [NS-3 based Named Data Networking (NDN) simulator](http://ndnsim.net/1.0/)
+went through extensive refactoring and rewriting.  The key new features of the new
+version:
+
+- Packet format changed to [NDN Packet Specification](http://named-data.net/doc/ndn-tlv/)
+
+- ndnSIM uses implementation of basic NDN primitives from
   [ndn-cxx library (NDN C++ library with eXperimental eXtensions)](http://named-data.net/doc/ndn-cxx/)
 
 - All NDN forwarding and management is implemented directly using source code of
   [Named Data Networking Forwarding Daemon (NFD)](http://named-data.net/doc/NFD/)
 
-- Packet format changed to [NDN-TLV](http://named-data.net/doc/ndn-tlv/)
+- Allows [simulation of real applications](http://ndnsim.net/2.1/guide-to-simulate-real-apps.html)
+  written against ndn-cxx library
 
-[ndnSIM 2.0 documentation](http://ndnsim.net)
+[ndnSIM documentation](http://ndnsim.net)
 ---------------------------------------------
 
 For more information, including downloading and compilation instruction, please refer to